Faceting Design Diagram: Thorn – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Thorn (MC52.JRG)
By Jeff R. Graham
Copyright 2000
91.2% Light Return
Angles for R.I. = 1.54
17 facets + 6 facets on girdle = 23
2-fold, mirror-image symmetry
96 index L/W = 1.246 T/W = 0.840
T/L = 0.674 P/W = 0.383 C/W = 0.130
H/W = (P+C)/W+0.02 = 0.532
P/H = 0.719 C/H = 0.243
Vol./W^3 = 0.179

Addition # 7 – Basically cut this like a square, then cut the P3(G) to get the L/W… This is easy and fast. I like it in about any material, it works well in dark colors. Cut in refractive indexes 1.54 to 1.93 with no changes. This design makes nice earrings…


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

About the author
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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